Electrode system



FIG. 1 is a top plan view of an electrode system, showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view taken from the left edge of FIG. 1;

FIG. 4 is a side elevational view taken from the lower edge of FIG. 1;

FIG. 5 is a side elevational view taken from the right edge of FIG. 1; and,

FIG. 6 is a side elevational view taken from the upper edge of FIG. 1. 

The ornamental design for an electrode system, as shown and described. 